F04D - Non-positive-displacement pumps

More topics under "F04D - Non-positive-displacement pumps" (138,013)
F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447)
F04D 11 - Other rotary non-positive-displacement pumps (219)
F04D 13 - Pumping installations or systems (12,375)
F04D 15 - Control, e.g. regulation, of pumps, pumping installations, or systems (4,967)
F04D 17 - Radial-flow pumps specially adapted for elastic fluids, e.g. centrifugal pumps; Helico-centrifugal pumps specially adapted for elastic fluids (4,320)
F04D 19 - Axial-flow pumps specially adapted for elastic fluids (3,780)
F04D 21 - Pumps specially adapted for elastic fluids involving supersonic speed of pumped fluids (215)
F04D 23 - Other rotary non-positive-displacement pumps specially adapted for elastic fluids (928)
F04D 25 - Pumping installations or systems specially adapted for elastic fluids (17,127)
F04D 27 - Control, e.g. regulation, of pumps, pumping nstallations or pumping systems specially adapted for elastic fluids (9,590)
F04D 29 - Details, component parts, or accessories (70,655)
F04D 3 - Axial-flow pumps (1,557)
F04D 31 - Pumping liquids and elastic fluids at the same time (579)
F04D 33 - Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type (448)
F04D 35 - Pumps producing waves in liquids, i.e. wave-producers (91)
F04D 5 - Pumps with circumferential or transverse flow (1,752)
F04D 7 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (4,105)
F04D 9 - Priming; Preventing vapour lock (1,858)

Patents for F04D - Non-positive-displacement pumps (137)
06/1994
06/14/1994	CA2074444C Combination lift piston/axial port unloader arrangement for a screw compressor
09/1993
09/14/1993	US5243822 Hydraulic rotary pump-turbine as a torque converter
05/1993
05/18/1993	US5211026 Combination lift piston/axial port unloader arrangement for a screw compresser
03/1993
03/04/1993	WO1993004286A1 Capacity control for screw compressors
12/1992
12/24/1992	DE4218205A1 Controlling start of screw compressor to be driven by three-phase motor - measuring pressure produced by rotary movement of screw compressor and stopping drive motor if pressure is in contrast compared to normal pressure
07/1992
07/08/1992	EP0493428A1 Pump or compressor unit.
11/1991
11/05/1991	US5062779 Outlet valve for a rolling piston rotary compressor
09/1991
09/18/1991	CN1054652A Discrete shroud structure
08/1991
08/21/1991	CN1013610B Transition duct for centrifugal fan
05/1991
05/21/1991	CA1284285C Device for pumping highly-viscous material, in particular thick oil
03/1991
03/20/1991	EP0276224B1 Device for pumping highly-viscous material, in particular thick oil
03/19/1991	WO1991004417A1 Pump or compressor unit
03/19/1991	CA2066672A1 Pump or compressor unit
11/1990
11/29/1990	WO1990014518A1 Hydraulic rotary pump-turbine as a torque converter
09/1990
09/13/1990	DE4007371A1 Outlet valve for rotary piston compressor
07/1990
07/11/1990	CN1008760B Hermetically sealed rotary compressor
06/1990
06/06/1990	CN1042759A Transition duct for centrifugal fan
05/1990
05/23/1990	EP0369783A2 Transition duct for centrifugal fan
05/15/1990	US4925368 Turbo-compressor having air-cooled bearing
01/1990
01/02/1990	US4891169 Transition duct for centrifugal fan
12/1989
12/28/1989	WO1989012753A1 Multi-stage turbo-compressor
01/1989
01/04/1989	EP0297672A2 Turbo-compressor having air cooled bearing
12/1988
12/27/1988	US4793767 Device for pumping highly-viscous material, in particular thick oil
10/1988
10/25/1988	US4780056 For supplying air to a spray paint system
08/1988
08/03/1988	EP0276224A1 Device for pumping highly-viscous material, in particular thick oil.
12/1987
12/16/1987	CN87103613A Hermetically sealed rotary compressor
06/1987
06/18/1987	WO1987003652A1 Device for pumping highly-viscous material, in particular thick oil
12/1986
12/23/1986	CA1215548A1 Hydraulically driven compressor/pump apparatus for resonant free piston stirling engine
12/02/1986	CA1214686A1 Method for regulating the function of a centrifugal pump
02/1986
02/11/1986	US4569636 Device for regulating the delivery of rotary compressors
04/1985
04/16/1985	US4511308 Axial and mixed flow fans and blowers
06/1982
06/10/1982	WO1982001919A1 Stall-free axial flow fan
04/1982
04/13/1982	CA1121775A1 Impeller for a variable pitch axial flow fan
07/1980
07/22/1980	US4213744 Hydraulic pump and improved by-pass flow means therefor
11/1979
11/27/1979	CA1066950A1 Power steering pump
09/1979
09/19/1979	EP0004041A1 Apparatus for limiting the fluid volume output in a rotary pump
02/1976
02/03/1976	US3936239 Undercompression and overcompression free helical screw rotary compressor

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